Swivel chair



FIG. 1 is a top, front and right side perspective view of a swivel chair showing my new design;

FIG. 2 is a top, front and left side perspective view thereof;

FIG. 3 is a top, rear and right side perspective view thereof;

FIG. 4 is a top, rear and left side perspective view thereof;

FIG. 5 is a bottom, rear and left side perspective view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a right view thereof;

FIG. 8 is a front view thereof;

FIG. 9 is a left view thereof; and,

FIG. 10 is a rear view thereof. 

CLAIM The ornamental design for a swivel chair, as shown and described. 